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Vortex-induced vibration control of a streamline box girder using the wake perturbation of horizontal axis micro-wind turbines
Journal of Fluids and Structures ( IF 3.4 ) Pub Date : 2021-12-06 , DOI: 10.1016/j.jfluidstructs.2021.103444
Hongfu Zhang 1 , Han Zhang 1 , Dabo Xin 1 , Jian Zhan 2 , Rui Wang 2 , Lei Zhou 3
Affiliation  

The horizontal axis micro-wind turbine (HAMWT), a wind energy harvesting device, always engenders the streamwise component vorticity, which can potentially be applied to perform 3-D spanwise-varying control. As vortex shedding behind a bluff body is always efficiently suppressed via a 3-D spanwise-varying method, the HAMWT can be used to efficiently suppress the vortex-induced vibration (VIV). The control effect on mitigating the VIV of a streamline box girder is investigated through wind tunnel tests with HAMWTs installed in the spanwise direction. The results show that spanwise-distributed HAMWTs have significant control effects in suppressing the vortex-induced response with a symmetrical arrangement. As the spanwise distance and the height of the HAMWT decrease, the control effects improve. When the spanwise distance L < 3H and the height h < 0.3H (where H is the bridge deck height), the vortex-induced vibration is almost completely suppressed. Moreover, HAMWTs with a staggered arrangement are more effective than those with a symmetrical arrangement, and ultimately suppress the VIV response at different spanwise distances (at least at L = 1H–6H). Furthermore, wake analysis results indicate that wind turbines suppress vortex shedding, and the vortex-induced resonance is significantly weakened.



中文翻译:

基于水平轴微型风力机尾流扰动的流线型箱梁涡激振动控制

水平轴微型风力涡轮机 (HAMWT) 是一种风能收集装置,总是会产生流向分量涡度,可用于执行 3-D 展向变化控制。由于钝体后面的涡旋脱落总是通过 3-D 展向变化方法有效抑制,因此 HAMWT 可用于有效抑制涡激振动 (VIV)。通过在翼展方向安装 HAMWT 的风洞试验,研究了对减轻流线箱梁振动振动的控制效果。结果表明展向分布的HAMWTs在抑制对称排列的涡激响应方面具有显着的控制作用。随着展向距离和 HAMWT 高度的减小,控制效果提高。当展向距离L< 3 H和高度h < 0.3 H(其中H是桥面高度),涡激振动几乎完全被抑制。此外,交错排列的 HAMWT 比对称排列的 HAMWT 更有效,并最终抑制不同展向距离(至少在L = 1 H –6 H 处)的 VIV 响应。此外,尾流分析结果表明,风力涡轮机抑制了涡流脱落,涡激共振显着减弱。

更新日期:2021-12-06
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